If your data files in Outlook won’t open or get corrupted, or items appear to be missing in your inbox, you can use these steps to resolve the issues. <\/p>\n\n\n\n
The\n desktop Outlook app uses two types of data files to store local copies \nof your emails, calendars, contacts, and other items, to allow you \naccess to your information without an internet connection.<\/p>\n\n\n\n
If you’re using an Outlook.com, Outlook 365, or Exchange account, this information is stored in an Offline Outlook Data File using a .ost<\/strong> format. However, if you’re using a POP or IMAP account like those you get from an Internet Service Provider (ISP), your information will be stored in an Outlook Data File using a .pst<\/strong> format instead.<\/p>\n\n\n\n Typically,\n you can go for a long time without any problems, but sooner or later, \nthese files may stop working, and they can get damaged, which is why \nOutlook includes the Inbox Repair tool to diagnose and repair common \nerrors with .pst files, as well as a mechanism to recreate .ost files \nautomatically.<\/p>\n\n\n\n In this Windows 10 guide, we walk you through the steps to repair the data files when they’re damaged, items are missing in your inbox, or when a data file just won’t open in Outlook 2016 or previous versions.<\/p>\n\n\n\n If you have an Outlook.com, Outlook 365, or Exchange account, you can follow these steps to fix problems with a .ost data file in Outlook:<\/p>\n\n\n\n \nOnce you complete these steps, open Outlook again to automatically create a new .ost files for that particular account.<\/p>\n\n\n\n If you have an account connected using POP or IMAP settings, you can \nuse the following steps to fix problems with a .pst data file:<\/p>\n\n\n\n Once you complete these steps, the wizard will create a backup, \nproceed with the repair and create a log file with information about the\n repair process.<\/p>\n\n\n\n After the repair is complete, you can start the Outlook app associated with the data file.<\/p>\n","protected":false},"excerpt":{"rendered":" If your data files in Outlook won’t open or get corrupted, or items appear to be missing in your inbox, you can use these steps to resolve the issues. The desktop Outlook app uses two types of data files to store local copies of your emails, calendars, contacts, and other items, to allow you access […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-579","post","type-post","status-publish","format-standard","hentry","category-outlook"],"yoast_head":"\nHow to fix an Offline Outlook Data File (.ost)<\/h2>\n\n\n\n
%LOCALAPPDATA%\\Microsoft\\Outlook<\/code> to go directly to the location of the .ost file, and then jump to step No. 13<\/strong>. Otherwise, continue with the steps below.<\/li><\/ul><\/li>How to fix an Outlook Data File (.pst)<\/h2>\n\n\n\n
C:\\Program Files (x86)\\Microsoft Office\\root\\Office16<\/code> C:\\Program Files (x86)\\Microsoft Office\\Office15<\/code>. If you have an older version of the app, change “Office15” in the path to “Office14” for Outlook 2010, or to “Office13” for Outlook 2007.<\/li><\/ul><\/li>